Stranger on the Third Floor

Peter Lorre

The Stranger

John McGuire

Michael Ward

Margaret Tallichet

Jane

Charles Waldron

District Attorney

Elisha Cook Jr.

Joe Briggs

Charles Halton

Albert Meng

Ethel Griffies

Mrs. Kane

Cliff Clark

Martin

Oscar O'Shea

The Judge

Alec Craig

Defense Attorney

Otto Hoffman

Police Surgeon

Bobby Barber

Giuseppe, the Italian Grocer (uncredited)

Vince Barnett

Cafe Customer (uncredited)

Lee Bonnell

Reporter (uncredited)

Harry C. Bradley

Court Clerk (uncredited)

Lynton Brent

Cabdriver at Nick's (uncredited)